Here are the Advanced Evolutionary Guides for Hero Chao. You must grow the Chao with a hero character to obtain these.

Hero Spike Chao - Feed your chao Green System animals. It is white and yellowish, a spike on it's head and blue stirpes.

Hero Swim Chao - Feed your chao Yellow System animals. It is white with two short, green spikes on its head.

Hero Fly Chao - Feed your chao Purple System animals. It is white with short, purple spikes sticking out at the top.

Hero Power Chao - Feed your chao Red System animals. It is whtie and red with three spikes at the head.

Creating Advanced Chao

Creating Advanced Chao

There are 3 main factors that determine what type of chao you have:

The first factor is whether the Chao is a Neutral Chao, a Hero Chao or a Dark Chao.

The second factor is what Chaos Drives and Animals you've given your Chao, there are 7 categories of Animals, Green, Red, Purple, Yellow, Orange (Imaginary), Blue (Speacial) and Black (Ghost). By setting up different combonations of these 2 categories alone you can make 21 different Chao.

The Third category is the least reconized category but can still play a very important role in a Chao's appearence, after a Chao evolves into a adult if you can giving it a specific category of Animals/Drives it's appearence will change again.

For example, if you have an young adult Sonic Chao and keep giving it Purple Drives/Animals it will eventually turn a blue-ish purple and it will become an Elf Chao. Whereas if you just kept giving it Green Animals/Drives it would turn dark Blue and look a lot more like Sonic.

It would be very hard to list all the different combnations of Chao so here's just a basic list of the different types, that have been seen (if you email me the info about one I don't have listed here or don't have info for, I'll list it here). Thanks to the Chao Shrine (http://www.geocities.com/chaoshrine) for letting me some of their info.